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Related Experiment Videos

Exercise-induced neurally mediated syncope

H Abe1, Y Iwami, Y Nakashima

  • 1Second Department of Internal Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan.

Japanese Heart Journal
|July 1, 1997
PubMed
Summary

Syncope in young runners may signal serious conditions. Disopyramide effectively prevented exercise-induced syncope and bradycardia in a teenage athlete, unlike propranolol.

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Area of Science:

  • Cardiology
  • Sports Medicine
  • Pediatrics

Background:

  • Syncope during athletic activity warrants thorough investigation, particularly in young athletes.
  • Exercise-associated syncope can be linked to potentially life-threatening cardiac disorders.

Observation:

  • A 16-year-old female competitive long-distance runner experienced recurrent syncope during races.
  • Syncope episodes were characterized by significant bradycardia and asystole, confirmed by head-up tilt testing.
  • Initial treatment with oral propranolol was ineffective in preventing syncope.

Findings:

  • Oral disopyramide therapy successfully prevented syncope during both head-up tilt testing and competitive running.
  • The patient's syncope was associated with marked bradycardia and asystole, responsive to disopyramide.

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Implications:

  • Disopyramide may be an effective treatment for specific types of exercise-induced syncope in athletes.
  • Head-up tilt testing is a valuable diagnostic method for evaluating syncope in young athletes.
  • Physicians should consider serious underlying cardiac conditions in pediatric athletes presenting with syncope.